/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 2013 Oracle and/or its affiliates. All rights reserved.
 *
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
 * https://github.com/payara/Payara/blob/main/LICENSE.txt
 * See the License for the specific
 * language governing permissions and limitations under the License.
 *
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at legal/OPEN-SOURCE-LICENSE.txt.
 *
 * GPL Classpath Exception:
 * Oracle designates this particular file as subject to the "Classpath"
 * exception as provided by Oracle in the GPL Version 2 section of the License
 * file that accompanied this code.
 *
 * Modifications:
 * If applicable, add the following below the License Header, with the fields
 * enclosed by brackets [] replaced by your own identifying information:
 * "Portions Copyright [year] [name of copyright owner]"
 *
 * Contributor(s):
 * If you wish your version of this file to be governed by only the CDDL or
 * only the GPL Version 2, indicate your decision by adding "[Contributor]
 * elects to include this software in this distribution under the [CDDL or GPL
 * Version 2] license."  If you don't indicate a single choice of license, a
 * recipient has the option to distribute your version of this file under
 * either the CDDL, the GPL Version 2 or to extend the choice of license to
 * its licensees as provided above.  However, if you add GPL Version 2 code
 * and therefore, elected the GPL Version 2 license, then the option applies
 * only if the new code is made subject to such option by the copyright
 * holder.
 */
package org.glassfish.internal.data;

import org.glassfish.hk2.api.HK2Loader;
import org.glassfish.hk2.api.MultiException;
import org.glassfish.hk2.api.ServiceLocator;
import org.glassfish.hk2.bootstrap.PopulatorPostProcessor;
import org.glassfish.hk2.utilities.DescriptorImpl;

/**
 * If there has been no other PopulatorPostProcessor that has set the descriptors
 * HK2Loader then this one will set it to an appropriate loader for the application,
 * using the application classloader
 * @author jwells
 *
 */
public class ApplicationClassLoadingPostProcessor implements
        PopulatorPostProcessor {
    private final HK2Loader applicationLoader;
    
    /* package */
    ApplicationClassLoadingPostProcessor(final ClassLoader appClassLoader) {
        applicationLoader = new HK2Loader() {

            @Override
            public Class<?> loadClass(String className) throws MultiException {
                try {
                    return appClassLoader.loadClass(className);
                }
                catch (Throwable th) {
                    throw new MultiException(th);
                }
            }
            
        };
    }

    /* (non-Javadoc)
     * @see org.glassfish.hk2.bootstrap.PopulatorPostProcessor#process(org.glassfish.hk2.api.ServiceLocator, org.glassfish.hk2.utilities.DescriptorImpl)
     */
    @Override
    public DescriptorImpl process(ServiceLocator serviceLocator,
            DescriptorImpl descriptorImpl) {
        if (descriptorImpl.getLoader() != null) return descriptorImpl;
        
        descriptorImpl.setLoader(applicationLoader);
        return descriptorImpl;
    }

}
